our top story, lance armstrong comes clean after a decade of denial. >> in a candid one-on-one interview with oprah winfrey he admitted doping and he didn't hold anything back. sarah simmons is here with the details. >> we have known that the former tour de france champ admitted he used performance- enhancing drugs. last night he told oprah he used blood transfusions, testosterone and human growth hormones. >> i made my decisions, they are my mistake, and i am sitting here today to acknowledge that. >> years of accusations and explanations, lance armstrong has come clean. >> yes or no, did you ever take banned substances to enhance your cycling performance? >> yes. >> the admission comes after more than a decade of denial. time and time again rerebuffed claims he used performance- enhancing drugs to catapult him to the top of his sport, winning the tour de france seven times in a row. >> to the skeptics, critics, i'm sorry, and i'm sorry you don't believe in miracles. >> he now admits that feat wouldn't be possible watt drugs. >> in all seven of your tour de france victories did you ever